You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
614 lines
14 KiB
614 lines
14 KiB
let Node = require("./components/Node");
|
|
let util = require('../../util');
|
|
|
|
class SelectionHandler {
|
|
constructor(body, canvas) {
|
|
this.body = body;
|
|
this.canvas = canvas;
|
|
this.selectionObj = {nodes: [], edges: []};
|
|
|
|
this.options = {};
|
|
this.defaultOptions = {
|
|
select: true,
|
|
selectConnectedEdges: true
|
|
};
|
|
util.extend(this.options, this.defaultOptions);
|
|
|
|
this.body.emitter.on("_dataChanged", () => {
|
|
this.updateSelection()
|
|
});
|
|
}
|
|
|
|
|
|
setOptions(options) {
|
|
if (options !== undefined) {
|
|
util.deepExtend(this.options, options);
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* handles the selection part of the tap;
|
|
*
|
|
* @param {Object} pointer
|
|
* @private
|
|
*/
|
|
selectOnPoint(pointer) {
|
|
let selected = false;
|
|
if (this.options.select === true) {
|
|
this.unselectAll();
|
|
let obj = this.getNodeAt(pointer) || this.getEdgeAt(pointer);;
|
|
if (obj !== undefined) {
|
|
selected = this.selectObject(obj);
|
|
}
|
|
this.body.emitter.emit("_requestRedraw");
|
|
}
|
|
return selected;
|
|
}
|
|
|
|
selectAdditionalOnPoint(pointer) {
|
|
let selectionChanged = false;
|
|
if (this.options.select === true) {
|
|
let obj = this.getNodeAt(pointer) || this.getEdgeAt(pointer);;
|
|
|
|
if (obj !== undefined) {
|
|
selectionChanged = true;
|
|
if (obj.isSelected() === true) {
|
|
this.deselectObject(obj);
|
|
}
|
|
else {
|
|
this.selectObject(obj);
|
|
}
|
|
|
|
this.body.emitter.emit("_requestRedraw");
|
|
}
|
|
}
|
|
return selectionChanged;
|
|
}
|
|
|
|
_generateClickEvent(eventType, pointer, oldSelection) {
|
|
let properties = this.getSelection();
|
|
properties['pointer'] = {
|
|
DOM: {x: pointer.x, y: pointer.y},
|
|
canvas: this.canvas.DOMtoCanvas(pointer)
|
|
}
|
|
|
|
if (oldSelection !== undefined) {
|
|
properties['previousSelection'] = oldSelection;
|
|
}
|
|
this.body.emitter.emit(eventType, properties);
|
|
}
|
|
|
|
selectObject(obj, highlightEdges = this.options.selectConnectedEdges) {
|
|
if (obj !== undefined) {
|
|
if (obj instanceof Node) {
|
|
if (highlightEdges === true) {
|
|
this._selectConnectedEdges(obj);
|
|
}
|
|
}
|
|
obj.select();
|
|
this._addToSelection(obj);
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
deselectObject(obj) {
|
|
if (obj.isSelected() === true) {
|
|
obj.selected = false;
|
|
this._removeFromSelection(obj);
|
|
}
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
* retrieve all nodes overlapping with given object
|
|
* @param {Object} object An object with parameters left, top, right, bottom
|
|
* @return {Number[]} An array with id's of the overlapping nodes
|
|
* @private
|
|
*/
|
|
_getAllNodesOverlappingWith(object) {
|
|
let overlappingNodes = [];
|
|
let nodes = this.body.nodes;
|
|
for (let i = 0; i < this.body.nodeIndices.length; i++) {
|
|
let nodeId = this.body.nodeIndices[i];
|
|
if (nodes[nodeId].isOverlappingWith(object)) {
|
|
overlappingNodes.push(nodeId);
|
|
}
|
|
}
|
|
return overlappingNodes;
|
|
}
|
|
|
|
|
|
/**
|
|
* Return a position object in canvasspace from a single point in screenspace
|
|
*
|
|
* @param pointer
|
|
* @returns {{left: number, top: number, right: number, bottom: number}}
|
|
* @private
|
|
*/
|
|
_pointerToPositionObject(pointer) {
|
|
let canvasPos = this.canvas.DOMtoCanvas(pointer);
|
|
return {
|
|
left: canvasPos.x - 1,
|
|
top: canvasPos.y + 1,
|
|
right: canvasPos.x + 1,
|
|
bottom: canvasPos.y - 1
|
|
};
|
|
}
|
|
|
|
|
|
/**
|
|
* Get the top node at the a specific point (like a click)
|
|
*
|
|
* @param {{x: Number, y: Number}} pointer
|
|
* @return {Node | undefined} node
|
|
* @private
|
|
*/
|
|
getNodeAt(pointer) {
|
|
// we first check if this is an navigation controls element
|
|
let positionObject = this._pointerToPositionObject(pointer);
|
|
let overlappingNodes = this._getAllNodesOverlappingWith(positionObject);
|
|
// if there are overlapping nodes, select the last one, this is the
|
|
// one which is drawn on top of the others
|
|
if (overlappingNodes.length > 0) {
|
|
return this.body.nodes[overlappingNodes[overlappingNodes.length - 1]];
|
|
}
|
|
else {
|
|
return undefined;
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* retrieve all edges overlapping with given object, selector is around center
|
|
* @param {Object} object An object with parameters left, top, right, bottom
|
|
* @return {Number[]} An array with id's of the overlapping nodes
|
|
* @private
|
|
*/
|
|
_getEdgesOverlappingWith(object, overlappingEdges) {
|
|
let edges = this.body.edges;
|
|
for (let i = 0; i < this.body.edgeIndices.length; i++) {
|
|
let edgeId = this.body.edgeIndices[i];
|
|
if (edges[edgeId].isOverlappingWith(object)) {
|
|
overlappingEdges.push(edgeId);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* retrieve all nodes overlapping with given object
|
|
* @param {Object} object An object with parameters left, top, right, bottom
|
|
* @return {Number[]} An array with id's of the overlapping nodes
|
|
* @private
|
|
*/
|
|
_getAllEdgesOverlappingWith(object) {
|
|
let overlappingEdges = [];
|
|
this._getEdgesOverlappingWith(object,overlappingEdges);
|
|
return overlappingEdges;
|
|
}
|
|
|
|
|
|
/**
|
|
* Place holder. To implement change the getNodeAt to a _getObjectAt. Have the _getObjectAt call
|
|
* getNodeAt and _getEdgesAt, then priortize the selection to user preferences.
|
|
*
|
|
* @param pointer
|
|
* @returns {undefined}
|
|
* @private
|
|
*/
|
|
getEdgeAt(pointer) {
|
|
let positionObject = this._pointerToPositionObject(pointer);
|
|
let overlappingEdges = this._getAllEdgesOverlappingWith(positionObject);
|
|
|
|
if (overlappingEdges.length > 0) {
|
|
return this.body.edges[overlappingEdges[overlappingEdges.length - 1]];
|
|
}
|
|
else {
|
|
return undefined;
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* Add object to the selection array.
|
|
*
|
|
* @param obj
|
|
* @private
|
|
*/
|
|
_addToSelection(obj) {
|
|
if (obj instanceof Node) {
|
|
this.selectionObj.nodes[obj.id] = obj;
|
|
}
|
|
else {
|
|
this.selectionObj.edges[obj.id] = obj;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Add object to the selection array.
|
|
*
|
|
* @param obj
|
|
* @private
|
|
*/
|
|
_addToHover(obj) {
|
|
if (obj instanceof Node) {
|
|
this.hoverObj.nodes[obj.id] = obj;
|
|
}
|
|
else {
|
|
this.hoverObj.edges[obj.id] = obj;
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* Remove a single option from selection.
|
|
*
|
|
* @param {Object} obj
|
|
* @private
|
|
*/
|
|
_removeFromSelection(obj) {
|
|
if (obj instanceof Node) {
|
|
delete this.selectionObj.nodes[obj.id];
|
|
}
|
|
else {
|
|
delete this.selectionObj.edges[obj.id];
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Unselect all. The selectionObj is useful for this.
|
|
*
|
|
* @private
|
|
*/
|
|
unselectAll() {
|
|
for(let nodeId in this.selectionObj.nodes) {
|
|
if(this.selectionObj.nodes.hasOwnProperty(nodeId)) {
|
|
this.selectionObj.nodes[nodeId].unselect();
|
|
}
|
|
}
|
|
for(let edgeId in this.selectionObj.edges) {
|
|
if(this.selectionObj.edges.hasOwnProperty(edgeId)) {
|
|
this.selectionObj.edges[edgeId].unselect();
|
|
}
|
|
}
|
|
|
|
this.selectionObj = {nodes:{},edges:{}};
|
|
}
|
|
|
|
|
|
/**
|
|
* return the number of selected nodes
|
|
*
|
|
* @returns {number}
|
|
* @private
|
|
*/
|
|
_getSelectedNodeCount() {
|
|
let count = 0;
|
|
for (let nodeId in this.selectionObj.nodes) {
|
|
if (this.selectionObj.nodes.hasOwnProperty(nodeId)) {
|
|
count += 1;
|
|
}
|
|
}
|
|
return count;
|
|
}
|
|
|
|
/**
|
|
* return the selected node
|
|
*
|
|
* @returns {number}
|
|
* @private
|
|
*/
|
|
_getSelectedNode() {
|
|
for (let nodeId in this.selectionObj.nodes) {
|
|
if (this.selectionObj.nodes.hasOwnProperty(nodeId)) {
|
|
return this.selectionObj.nodes[nodeId];
|
|
}
|
|
}
|
|
return undefined;
|
|
}
|
|
|
|
/**
|
|
* return the selected edge
|
|
*
|
|
* @returns {number}
|
|
* @private
|
|
*/
|
|
_getSelectedEdge() {
|
|
for (let edgeId in this.selectionObj.edges) {
|
|
if (this.selectionObj.edges.hasOwnProperty(edgeId)) {
|
|
return this.selectionObj.edges[edgeId];
|
|
}
|
|
}
|
|
return undefined;
|
|
}
|
|
|
|
|
|
/**
|
|
* return the number of selected edges
|
|
*
|
|
* @returns {number}
|
|
* @private
|
|
*/
|
|
_getSelectedEdgeCount() {
|
|
let count = 0;
|
|
for (let edgeId in this.selectionObj.edges) {
|
|
if (this.selectionObj.edges.hasOwnProperty(edgeId)) {
|
|
count += 1;
|
|
}
|
|
}
|
|
return count;
|
|
}
|
|
|
|
|
|
/**
|
|
* return the number of selected objects.
|
|
*
|
|
* @returns {number}
|
|
* @private
|
|
*/
|
|
_getSelectedObjectCount() {
|
|
let count = 0;
|
|
for(let nodeId in this.selectionObj.nodes) {
|
|
if(this.selectionObj.nodes.hasOwnProperty(nodeId)) {
|
|
count += 1;
|
|
}
|
|
}
|
|
for(let edgeId in this.selectionObj.edges) {
|
|
if(this.selectionObj.edges.hasOwnProperty(edgeId)) {
|
|
count += 1;
|
|
}
|
|
}
|
|
return count;
|
|
}
|
|
|
|
/**
|
|
* Check if anything is selected
|
|
*
|
|
* @returns {boolean}
|
|
* @private
|
|
*/
|
|
_selectionIsEmpty() {
|
|
for(let nodeId in this.selectionObj.nodes) {
|
|
if(this.selectionObj.nodes.hasOwnProperty(nodeId)) {
|
|
return false;
|
|
}
|
|
}
|
|
for(let edgeId in this.selectionObj.edges) {
|
|
if(this.selectionObj.edges.hasOwnProperty(edgeId)) {
|
|
return false;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
|
|
/**
|
|
* check if one of the selected nodes is a cluster.
|
|
*
|
|
* @returns {boolean}
|
|
* @private
|
|
*/
|
|
_clusterInSelection() {
|
|
for(let nodeId in this.selectionObj.nodes) {
|
|
if(this.selectionObj.nodes.hasOwnProperty(nodeId)) {
|
|
if (this.selectionObj.nodes[nodeId].clusterSize > 1) {
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* select the edges connected to the node that is being selected
|
|
*
|
|
* @param {Node} node
|
|
* @private
|
|
*/
|
|
_selectConnectedEdges(node) {
|
|
for (let i = 0; i < node.edges.length; i++) {
|
|
let edge = node.edges[i];
|
|
edge.select();
|
|
this._addToSelection(edge);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* select the edges connected to the node that is being selected
|
|
*
|
|
* @param {Node} node
|
|
* @private
|
|
*/
|
|
_hoverConnectedEdges(node) {
|
|
for (let i = 0; i < node.edges.length; i++) {
|
|
let edge = node.edges[i];
|
|
edge.hover = true;
|
|
this._addToHover(edge);
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* unselect the edges connected to the node that is being selected
|
|
*
|
|
* @param {Node} node
|
|
* @private
|
|
*/
|
|
_unselectConnectedEdges(node) {
|
|
for (let i = 0; i < node.edges.length; i++) {
|
|
let edge = node.edges[i];
|
|
edge.unselect();
|
|
this._removeFromSelection(edge);
|
|
}
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/**
|
|
* This is called when someone clicks on a node. either select or deselect it.
|
|
* If there is an existing selection and we don't want to append to it, clear the existing selection
|
|
*
|
|
* @param {Node || Edge} object
|
|
* @private
|
|
*/
|
|
blurObject(object) {
|
|
if (object.hover === true) {
|
|
object.hover = false;
|
|
this.body.emitter.emit("blurNode",{node:object.id});
|
|
}
|
|
}
|
|
|
|
/**
|
|
* This is called when someone clicks on a node. either select or deselect it.
|
|
* If there is an existing selection and we don't want to append to it, clear the existing selection
|
|
*
|
|
* @param {Node || Edge} object
|
|
* @private
|
|
*/
|
|
hoverObject(object) {
|
|
if (object.hover === false) {
|
|
object.hover = true;
|
|
this._addToHover(object);
|
|
if (object instanceof Node) {
|
|
this.body.emitter.emit("hoverNode",{node:object.id});
|
|
}
|
|
}
|
|
if (object instanceof Node) {
|
|
this._hoverConnectedEdges(object);
|
|
}
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
*
|
|
* retrieve the currently selected objects
|
|
* @return {{nodes: Array.<String>, edges: Array.<String>}} selection
|
|
*/
|
|
getSelection() {
|
|
let nodeIds = this.getSelectedNodes();
|
|
let edgeIds = this.getSelectedEdges();
|
|
return {nodes:nodeIds, edges:edgeIds};
|
|
}
|
|
|
|
/**
|
|
*
|
|
* retrieve the currently selected nodes
|
|
* @return {String[]} selection An array with the ids of the
|
|
* selected nodes.
|
|
*/
|
|
getSelectedNodes() {
|
|
let idArray = [];
|
|
if (this.options.select === true) {
|
|
for (let nodeId in this.selectionObj.nodes) {
|
|
if (this.selectionObj.nodes.hasOwnProperty(nodeId)) {
|
|
idArray.push(nodeId);
|
|
}
|
|
}
|
|
}
|
|
return idArray;
|
|
}
|
|
|
|
/**
|
|
*
|
|
* retrieve the currently selected edges
|
|
* @return {Array} selection An array with the ids of the
|
|
* selected nodes.
|
|
*/
|
|
getSelectedEdges() {
|
|
let idArray = [];
|
|
if (this.options.select === true) {
|
|
for (let edgeId in this.selectionObj.edges) {
|
|
if (this.selectionObj.edges.hasOwnProperty(edgeId)) {
|
|
idArray.push(edgeId);
|
|
}
|
|
}
|
|
}
|
|
return idArray;
|
|
}
|
|
|
|
|
|
/**
|
|
* select zero or more nodes with the option to highlight edges
|
|
* @param {Number[] | String[]} selection An array with the ids of the
|
|
* selected nodes.
|
|
* @param {boolean} [highlightEdges]
|
|
*/
|
|
selectNodes(selection, highlightEdges = true) {
|
|
let i, id;
|
|
|
|
if (!selection || (selection.length === undefined))
|
|
throw 'Selection must be an array with ids';
|
|
|
|
// first unselect any selected node
|
|
this.unselectAll();
|
|
|
|
for (i = 0; i < selection.length; i++) {
|
|
id = selection[i];
|
|
|
|
let node = this.body.nodes[id];
|
|
if (!node) {
|
|
throw new RangeError('Node with id "' + id + '" not found');
|
|
}
|
|
this.selectObject(node,highlightEdges);
|
|
}
|
|
this.body.emitter.emit('_requestRedraw');
|
|
}
|
|
|
|
|
|
/**
|
|
* select zero or more edges
|
|
* @param {Number[] | String[]} selection An array with the ids of the
|
|
* selected nodes.
|
|
*/
|
|
selectEdges(selection) {
|
|
let i, id;
|
|
|
|
if (!selection || (selection.length === undefined))
|
|
throw 'Selection must be an array with ids';
|
|
|
|
// first unselect any selected objects
|
|
this.unselectAll();
|
|
|
|
for (i = 0; i < selection.length; i++) {
|
|
id = selection[i];
|
|
|
|
let edge = this.body.edges[id];
|
|
if (!edge) {
|
|
throw new RangeError('Edge with id "' + id + '" not found');
|
|
}
|
|
this.selectObject(edge);
|
|
}
|
|
this.body.emitter.emit('_requestRedraw');
|
|
}
|
|
|
|
/**
|
|
* Validate the selection: remove ids of nodes which no longer exist
|
|
* @private
|
|
*/
|
|
updateSelection() {
|
|
for (let nodeId in this.selectionObj.nodes) {
|
|
if (this.selectionObj.nodes.hasOwnProperty(nodeId)) {
|
|
if (!this.body.nodes.hasOwnProperty(nodeId)) {
|
|
delete this.selectionObj.nodes[nodeId];
|
|
}
|
|
}
|
|
}
|
|
for (let edgeId in this.selectionObj.edges) {
|
|
if (this.selectionObj.edges.hasOwnProperty(edgeId)) {
|
|
if (!this.body.edges.hasOwnProperty(edgeId)) {
|
|
delete this.selectionObj.edges[edgeId];
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
export default SelectionHandler;
|